Trap



Dec. 2s ,1926. 1,612,195

R. O. KIRCHHAN El' AL TRAP Filed Jan. 19. 1925 Rmb QPL D Kmhhan PatentedDee. 2S, 1926.

unirse stares ROBERT 0. KRCHHAN AND CHARLES 0.

KIRCHHAN, OE MILVAUKEE, XTISCONSN.

TRAP.

Application tiled January 19, i925. Serial No. 3,351.

This invention relates to certain new and useful improvement-s in trapsmore particularly of the drain type designed to be incorporated in thesewerage and drainage system of a building.

It is one of the objects of this invention to improve and simplify theconstruction of drain trapsand to provide positive protection againstthe backing-up of water from the main sewer into the building drain.

It is another object vof this invention to provide a drain trap or valveofthe character described which is normally open to permit the freeflowage of drainage therethrough to the main sewer, and which is quicklyclosed upon the water backing-up through the trap above a predeterminedlevel to thus prevent overflowing of the sewer water into the building..t

lilith the above and other objects 1n view which will appear as thedescription proceeds, our invention resides in the novel construction,combination and arrangement of parts substantially as hereinafterdescribed and more particularly defined by the appended claims, it beingunderstood that such changes in the precise embodiment of thehereindisclosed invention may be made as come within the scope of theclaims.

In the accompanying drawing, we have illustrated one complete example ofthe physical embodiment of our invention constructed according to thebest mode we have so far devised for the practical application of theprinciples thereof, and in which:

Figure 1 is a view, partly in vertical section and partly in sideelevation, of a drain trap embodying our invention, and

Figure 2 is a fragmentary view taken transversely through Figure 1 onthe plane of the line 2-2.

Referring now more particularly to the accompanying drawing, in whichlike numerals designate like parts throughout the several views; thenumeral 5 designates a casting which is preferably formed in one pieceand is of approximately inverted T-shape, the transverse portion or headof the "i" having its ends 6 and 7 designed for connection with the mainsewer and the building drain, respectively. The main sewer is adapted tobe connected with the end 6 by a suitable pipe or conduit 8 and the end'l' is adapted to be connected with the building drain through asuitable drain pipe, tile or other conduit 9. l

rllhe vertical portion 10 of the trap prorides a float chamber 11, theupper end of which is normally closed by a removable Cover 12 secured inplace by removable fasl tenings 13 and having a water tight gasket 14C.The extreme upper end of the fioat chamber above the maximum waterlevel, which is indicated by the dotted line 15, is connected with theusual vent by a conduit 16 of suitable type.

The inlet 7 is preferably provided with a recess or indented portion 17to receive lead or other packing means 13 to secure the building drain 9in position and bolted or iii otherwise secured, as at 18, to the inletport or opening 19 is a valve sleeve 2O which is preferably of bronze orother acid resisting material. The outer end 21 of the sleeve is taperedin the manner illustrated in Figure 'i5 1 to provide a seat for a valve22 hingedly supported from the sleeve by an arm 23 secured between apair of spaced bracket arms 24 formed on the sleeve 20 by a pivot pin25. The arm 23 extends beyond the pivot 25 at an angle to the valve, asat 26, and is provided with a pair of links 27 pivotally secured to theopposite sides thereof by a pin 2 8, the other end of the links beingpivotally connected by a pin 29 to the opposite sides of a float lever30 at a medial point. One end of the float lever is pivoted betweenextensions 31 of the bracket arms 24 by a pivot pin 32 and the other endthereof is bifurcated to receive the flattened stud 33 of if a float 34:which is pivoted therein by a pin 35.

The float 34 is preferably of copper or other suitable material and theweight thereof together with that of the lever is sufficient to normallymaintain the valve 22 in its full line position illustrated in Figure 1.In the event the water Within the trap raises to a height substantiallyequal to the dotted line 15, the float engages the valve its) 22 withits seat 21 to effectively and positively close the inlet 19,disconnecting the building drain and the sewer and the greater the backpressure of water from the sewer, the tighter valve 22 is engaged withits 1er seat.

The leverage arrangement shown in the drawing insures the maximum ofclosing stress and the instant opening of the valve upon the dropping ofthe water below the line 15. The valve chamber 11 is preferably formedwith an oit-set 36 t'o accommodate the leverage arrangement as clearlyshown in the drawing.

What We claim as our invention is:

l. A device of the character described, comprising a chamber having aninlet and an outlet, means connecting the inlet with. a source of fluidsupply, means connecting the outlet With a discharge, a tubular sleeveadjacent the inlet and having a valvev seat, a valve engageable with theseat, a lug carried by the sleeve, means pivotally securing the valve tothe lug, a second lug,` carried by the sleeve and in alignment With thefirst-mentioned lug, a float mounted Within the chamber and adapted to'fellow the fluid level in the chamber, a lever pivot-ally connecting`the float with the second-mentioned lug, an arm projected from thevalve, and link means pivotally connecting,- the arm with said lever toopen and close the valve upon the rise and fall, respectively, of thefloat, said lever, arm, and link means being in alignment with the lugseXtended from the sleeve.

Q. A device ot the character described,

Leie, 195

comprising a chamber having an inlet and an outlet, means connecting theinlet with a drain, means connecting the outlet with a sewer, a tubularsleeve surrounding the inlet and providing a valve seat, a valveengageable with said seat, means pivot-ally snpporting the valve fromsaid sleeve, a loat mounted within the chamber and adapted to rise andfall With the increase and decrease in the Water level in said chamber,a lever having,- one end pivotally connected with said float, an armformed integral with said sleeve and to which the other end of saidlever is connected, an arm extending from said valve member, and linkmeans pivotally connecting said arm With the medial portion of saidlever whereby falling of said float member by a decrease in the Waterlevel in the said chamber opens said valve and an increase in the Waterlevel a predetermined degree closes the valve.

in testimony whereof We a-HX our signatures.

ROBERT O. KIRCHHAN. CHAS. O. KIRCHHAN.

